/*
 * Copyright (C) 2008-2008 LeGACY <http://www.legacy-project.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __LEGACY_GRIDREFERENCE_H
#define __LEGACY_GRIDREFERENCE_H

#include "Utilities/LinkedReference/Reference.h"

template<class OBJECT>
class GridRefManager;

template<class OBJECT>
class LEGACY_DLL_SPEC GridReference : public Reference<GridRefManager<OBJECT>, OBJECT>
{
	protected:
		void targetObjectBuildLink()
		{
			// called from link()
			this->getTarget()->insertFirst(this);
			this->getTarget()->incSize();
		}
		void targetObjectDestroyLink()
		{
			// called from unlink()
			if(this->isValid()) this->getTarget()->decSize();
		}
		void sourceObjectDestroyLink()
		{
			// called from invalidate()
			this->getTarget()->decSize();
		}
	public:
		GridReference() : Reference<GridRefManager<OBJECT>, OBJECT>() {}
		~GridReference() { this->unlink(); }
		GridReference *next() { return (GridReference*)Reference<GridRefManager<OBJECT>, OBJECT>::next(); }
};
#endif
